As the trocar is withdrawn, the canula should be pushed still further in. A Manual of the Operations of Surgery Joseph Bell. The best instruments are the trocar and canula, but in the absence of these a pocket knife and goose quill may be made to answer.
Bentonite is a geological clay material that is mainly made up of a mineral group called montmorillonite. It is usually created from volcanic ash that has been disintegrated by water. Other minerals included in bentonite clay are aluminum, calcium, potassium, and sodium. The predominance of one of these minerals dictates the names of the variants.
Bentonite is subject to the federal laws of the 1872 Mining Act. From a commercial standpoint, there are two primary types of natural bentonite, sodium and calcium. Sodium-Bentonite is characterized by its ability to absorb large amounts of water and form viscous, thixotropic suspensions.